The BirkoSport™ Two-Part Insole adds both support and cushioning to your athletic footwear. This two-piece system includes a 3/4 length cork arch support (bottom piece) and a shock-absorbing, full length foam insole (top piece). Recommended for athletic shoes, ski boots, and work boots. Best used in place of existing insoles. Blue insole may be trimmed as needed. Unisex.